diff --git a/MANIFEST.in b/MANIFEST.in
index 362d470b1c..1731a55875 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,9 +1,11 @@
 global-include *.txt
 global-include *.c
+global-include *.cc
 global-include *.cu
 global-include *.cuh
 global-include *.cpp
 global-include *.h
+global-include *.hh
 global-include *.sh
 recursive-include doc *
 include bin/pytensor-cache